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Supplemental Financial Data - Future Amortization of Intangibles (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]      
2023 $ 566.5    
2024 528.2    
2025 484.5    
2026 412.9    
2027 355.0    
Thereafter 1,324.8    
Total 3,671.9    
Computer software      
Finite-Lived Intangible Assets [Line Items]      
2023 146.6    
2024 140.2    
2025 128.2    
2026 87.8    
2027 61.1    
Thereafter 67.9    
Total 631.8    
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
2023 223.2    
2024 205.2    
2025 187.4    
2026 169.6    
2027 151.8    
Thereafter 599.5    
Total 1,536.7 $ 1,793.3 $ 1,912.9
Reacquired rights      
Finite-Lived Intangible Assets [Line Items]      
2023 18.8    
2024 18.8    
2025 18.8    
2026 18.8    
2027 18.8    
Thereafter 151.5    
Total 245.5 284.7 0.0
Database      
Finite-Lived Intangible Assets [Line Items]      
2023 161.3    
2024 147.9    
2025 134.0    
2026 120.7    
2027 107.5    
Thereafter 428.6    
Total 1,100.0 1,285.1 1,369.4
Other intangibles      
Finite-Lived Intangible Assets [Line Items]      
2023 16.6    
2024 16.1    
2025 16.1    
2026 16.0    
2027 15.8    
Thereafter 77.3    
Total $ 157.9 $ 181.4 $ 256.7